The correct option is B Testis of male
Each testis is oval-shaped measuring 4.5 cm long, 2.5 cm wide in adult. It is enclosed in fibrous sac called as tunica albuginea. The sac extends into a test to divide the testes into lobules. Next to tunica albuginea is tunica vaginalis, which is a continuation of membrane of abdomino-pelvic cavity. Each testis contain 800 lightly coiled seminiferous tubules, which produce thousands of sperm each second.